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Finding the Fourth Proportional to 316.74, 474.47 and 251.85

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Solution

The fourth proportional to 316.74, 474.47 and 251.85 is: 377.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    316.74 : 474.47 = 251.85 : x
  2. Step 2: Convert to fraction form
    316.74/474.47 = 251.85/x
  3. Step 3: Cross multiply
    316.74x = 474.47 × 251.85
  4. Step 4: Simplify right side
    316.74x = 119,495.27
  5. Step 5: Solve for x
    x = 119,495.27/316.74
  6. Step 6: Final answer
    x = 377.27

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.